ANS Physiology Review

Question 1

Iris Radial Muscle

Answer 1

Sympathetic Activity:
Action - contracts
Receptor - a1

Question 2

Iris Circular Muscle

Answer 2

Parasympathetic Activity: predominant tone
Action - contracts
Receptor - M3

Question 3

Ciliary Muscle

Answer 3

Sympathetic Activity:
Action - relaxes
Receptor - β

Parasympathetic Activity: predominant tone
Action - contracts
Receptor - M3

Question 4

Sinoatrial Node

Answer 4

Sympathetic Activity:
Action - Accelerates
Receptor - β1 (β2)

Parasympathetic Activity: predominant tone
Action - Decelerates
Receptor - M2

Question 5

Ectopic Pacemakers

Answer 5

Sympathetic Activity:
Action - Accelerates
Receptor - β1 (β2)

Question 6

Contractility

Answer 6

Sympathetic Activity:
Action - Increases
Receptor - β1 (β2)

Parasympathetic Activity:
Action - Decreases (atria)
Receptor - M2

Question 7

Skin, Splanchnic Vessels

Answer 7

Sympathetic Activity: predominant tone
Action - Contracts
Receptor - a

Question 8

Skeletal Muscle Vessels

Answer 8

Sympathetic Activity:
Action - Relaxes Action - (Contracts)
Receptor - β2 Receptor - a

Question 9

Endothelium (drug effect)

Answer 9

Parasympathetic Activity:
Action - Releases NO
Receptor - M3, M5

Question 10

Bronchiolar Smooth Muscle

Answer 10

Sympathetic Activity:
Action - Relaxes
Receptor - β2

Parasympathetic Activity: predominant tone
Action - Contracts
Receptor - M3

Question 11

GI Smooth Muscle Walls

Answer 11

Sympathetic Activity:
Action - Relaxes
Receptor - a2, β2

Parasympathetic Activity: predominant tone
Action - Contracts
Receptor - M3

Question 12

GI Smooth Muscle Sphincters

Answer 12

Sympathetic Activity:
Action - Contracts
Receptor - a1

Parasympathetic Activity: predominant tone
Action - Relaxes
Receptor - M3

Question 13

GI Secretion

Answer 13

Parasympathetic Activity: predominant tone
Action - Increases
Receptor - M3

Question 14

GU Smooth Muscle Bladder Wall

Answer 14

Sympathetic Activity:
Action - Relaxes
Receptor - β2

Parasympathetic Activity: predominant tone
Action - Contracts
Receptor - M3

Question 15

GU Smooth Muscle Sphincter

Answer 15

Sympathetic Activity:
Action - Contracts
Receptor - a1

Parasympathetic Activity: predominant tone
Action - Relaxes
Receptor - M3

Question 16

GU Smooth Muscle: Uterus. Pregnant

Answer 16

Sympathetic Activity:
Action - Relaxes Action - (Contracts)
Receptor - β2 Receptor - a

Parasympathetic Activity:
Action - Contracts
Receptor - M3

Question 17

GU Smooth Muscle: Penis, Seminal Vesicle

Answer 17

Sympathetic Activity:
Action - Ejaculation
Receptor - a

Parasympathetic Activity:
Action - Erection
Receptor - M

Question 18

Pilomotor Smooth Muscle

Answer 18

Sympathetic Activity:
Action - Contracts
Receptor - a

Question 19

Eccrine Glands

Answer 19

Sympathetic Activity: predominant tone
Action - Increases
Receptor - M

Question 20

Apocrine (Stress) Glands

Answer 20

Sympathetic Activity: predominant tone
Action - Increases
Receptor - a

Question 21

Liver Gluconeogenesis

Answer 21

Sympathetic Activity:

Receptor - β2, a

Question 22

Liver Glucogenolysis

Answer 22

Sympathetic Activity:

Receptor - β2, a

Question 23

Fat Cells Lipolysis

Answer 23

Sympathetic Activity:

Receptor - β3

Question 24

Kidney: Increased Renin Release

Answer 24

Sympathetic Activity:

Receptor - β1

Question 25

Kidney: Decreased Renin Release

Answer 25

Sympathetic Activity: | Receptor - a1